[retiredguy123]

Originally Posted by JGibson

The cashier lied to you.

Electronics: Costco will accept returns within 90 days (from the date the member received the merchandise) for Televisions, Projectors, Major Appliances (refrigerators above 10 cu. ft., freezers, ranges, cooktops, over-the-range microwaves, range hoods, dishwashers, water heaters, washers and dryers), Computers, Touchscreen Tablets, Smart Watches, Cameras, Aerial Cameras (drones), Camcorders, MP3 players and Cellular Phones (return details will vary by carrier service contract).

How do you know he lied? The Costco return policy you cited doesn't say anything about vacuum cleaners. I would define a vacuum cleaner as a small appliance, which would have an unlimited return period. Note that, even refrigerators less than 10 cubic feet are not considered major appliances by Costco.